A casing head shell

Abstract

The present invention relates to the technical field of casing heads, and specifically to a casing head shell, comprising a casing head shell, a plurality of bolt holes being opened on the surface of the casing head shell, an embedded seal being provided on the surface of the casing head shell, a clamping member being provided between the embedded seal and the bolt hole, and an elastic gasket being provided on the surface of the casing head shell; the beneficial effects are as follows: when the embedded seal installed on the casing head shell proposed by the present invention is squeezed, the clamping member is pushed into the bolt hole to clamp the bolt, thereby preventing the bolt from loosening, and the elastic gasket being installed on the surface of the casing head shell to realize elastic support for the bolt when locking, thereby preventing the bolt thread connection from loosening.

Description

Technical Field

[0001] The present invention relates to the technical field of casing heads, in particular to a casing head shell. Background Art

[0002] The casing head is used to fix the wellhead of the drilled well, connect the wellhead casing string, support the gravity of the technical casing and the oil layer casing, seal the annular space between the layers of pipes, provide a transition connection for the installation of blowout preventers, tubing heads, and Christmas trees, and through the two side ports on the casing head body, operations such as mud squeezing, monitoring, and adding balancing fluid can be carried out.

[0003] In the prior art, a flange is disposed at the end of the casing head, and the flange cooperates with bolts to connect and fix the casing head and the pipeline.

[0004] However, once the bolts connecting the flanges become loose, a gap will appear between the two sets of flanges, affecting the sealing of the connection between the casing head and the pipeline. Summary of the Invention

[0005] The object of the present invention is to provide a casing head housing to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a casing head shell, comprising a casing head shell, a plurality of bolt holes being provided on the surface of the casing head shell, an embedded seal being provided on the surface of the casing head shell, a clamping member being provided between the embedded seal and the bolt hole, and an elastic gasket being provided on the surface of the casing head shell.

[0007] Preferably, the embedded seal includes a mounting groove, an elastic sealing gasket and a telescopic notch. The mounting groove is an annular groove, which is opened on the surface of the casing head shell. The elastic sealing gasket is installed inside the mounting groove, and the elastic sealing gasket protrudes from the mounting groove.

[0008] Preferably, the telescopic notch is an annular groove, the outer ring diameter of the telescopic notch is smaller than the outer ring diameter of the mounting groove, and the telescopic notch is opened on the bottom surface of the mounting groove.

[0009] Preferably, the clamping member includes an embedding groove, a clamping block, a rubber gasket and a through hole. The embedding groove is opened on the outer ring surface of the elastic sealing gasket, one end of the clamping block is inserted and fixed in the embedding groove, and the other end of the clamping block is movably inserted in the through hole. The through hole is opened on the outer ring side wall of the mounting groove, and the through hole connects the mounting groove and the bolt hole.

[0010] Preferably, the rubber gasket is fixed to the other end of the clamping block, and one end of the embedded groove is provided with an inclined surface, which faces the notch of the installation groove.

[0011] Preferably, the elastic gasket includes an elastic gasket, a metal gasket, a long hole and a metal elastic sheet. The elastic gasket is fixed on the surface of the casing head shell. Multiple metal gaskets are installed on the surface of the elastic gasket. The long hole passes through the metal gasket and the elastic gasket, and the long hole corresponds to the bolt hole one by one.

[0012] Preferably, the metal elastic sheet is connected between two adjacent metal gaskets.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] When the embedded seal installed on the casing head shell proposed by the present invention is squeezed, the clamping piece is pushed into the bolt hole to clamp the bolt, thereby preventing the bolt from loosening. In addition, an elastic pad is installed on the surface of the casing head shell to realize elastic support for the bolt when locking it, thereby preventing the bolt thread connection from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the bottom structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the present invention after being cut open;

[0018] Figure 4 for Figure 3 A schematic diagram of the structure at center A;

[0019] Figure 5 This is a schematic diagram of the structure of the elastic sealing gasket after disassembly of the present invention;

[0020] Figure 6 It is a schematic diagram of the connection structure of the elastic gasket and the metal gasket of the present invention.

[0021] In the figure: casing head housing 1, bolt hole 2, mounting groove 3, elastic sealing gasket 4, telescopic notch 5, embedding groove 6, clamping block 7, rubber gasket 8, elastic washer 9, metal gasket 10, long hole 11, metal elastic sheet 12, through hole 13. DETAILED DESCRIPTION

[0022] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1

[0024] See also Figures 1 to 3 and Figure 5 The present invention provides a technical solution: a casing head shell, comprising a casing head shell 1, a plurality of bolt holes 2 are opened on the surface of the casing head shell 1, an embedded seal is provided on the surface of the casing head shell 1, a clamping member is provided between the embedded seal and the bolt hole 2, and an elastic gasket is provided on the surface of the casing head shell 1; when the embedded seal installed on the surface of the casing head shell 1 is squeezed, the clamping member is pushed into the bolt hole 2 to clamp the bolt to prevent the bolt from loosening, and the elastic gasket is installed on the surface of the casing head shell 1 to realize elastic support for the bolt when locking it, to prevent the bolt thread connection from loosening.

[0025] Example 2

[0026] Refer to the attached Figure 4 On the basis of embodiment 1, in order to realize the installation of the embedded seal, the embedded seal includes a mounting groove 3, an elastic sealing gasket 4 and a telescopic groove 5. The mounting groove 3 is an annular groove, and the mounting groove 3 is opened on the surface of the casing head housing 1. The elastic sealing gasket 4 is installed inside the mounting groove 3, and the elastic sealing gasket 4 protrudes from the mounting groove 3. The telescopic groove 5 is an annular groove, and the outer ring diameter of the telescopic groove 5 is smaller than the outer ring diameter of the mounting groove 3. The telescopic groove 5 is opened on the bottom surface of the mounting groove 3.

[0027] Example 3

[0028] On the basis of Example 2, in order to realize the installation of the clamping part, the clamping part includes an embedding groove 6, a clamping block 7, a rubber gasket 8 and a through hole 13. The embedding groove 6 is opened on the outer ring surface of the elastic sealing gasket 4, one end of the clamping block 7 is inserted and fixed in the embedding groove 6, and the other end of the clamping block 7 is movably inserted in the through hole 13. The through hole 13 is opened on the outer ring side wall of the mounting groove 3. The through hole 13 connects the mounting groove 3 and the bolt hole 2. The rubber gasket 8 is fixed to the other end of the clamping block 7. One end of the embedding groove 6 is provided with a bevel, and the bevel faces the notch of the mounting groove 3.

[0029] Example 4

[0030] On the basis of Example 3, in order to realize the installation of the elastic gasket, the elastic gasket includes an elastic gasket ring 9, a metal gasket 10, a long hole 11 and a metal elastic sheet 12. The elastic gasket ring 9 is fixed on the surface of the sleeve head shell 1. Multiple metal gaskets 10 are installed on the surface of the elastic gasket ring 9. The long hole 11 passes through the metal gasket 10 and the elastic gasket ring 9, and the long hole 11 corresponds to the bolt hole 2 one by one. The metal elastic sheet 12 is connected between two adjacent metal gaskets 10.

[0031] In actual use, after the flange at the end of the sleeve head shell 1 is connected with the flange at the end of the existing pipeline, the bolt is passed through the bolt hole 2 and locked. During the locking process, the elastic sealing gasket 4 is pressed into the installation groove 3, and the telescopic groove 5 provides a telescopic space for the elastic sealing gasket 4 to be squeezed in. When the elastic sealing gasket 4 is squeezed into the installation groove 3, the clamping block 7 is pushed toward the inside of the bolt hole 2, that is, the clamping block 7 clamps the bolt rod inside the bolt hole 2, and the metal gasket 10 and the elastic gasket 9 are clamped by the bolt to prevent the threaded connection of the bolt from loosening, thereby preventing the bolt from loosening, thereby ensuring the tight connection of the two sets of flanges.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A casing head housing, comprising a casing head housing (1), wherein a plurality of bolt holes (2) are provided on a surface of the casing head housing (1), and wherein: The surface of the casing head shell (1) is provided with an embedded seal, a clamping member is provided between the embedded seal and the bolt hole (2), and the surface of the casing head shell (1) is provided with an elastic gasket; the embedded seal comprises a mounting groove (3), an elastic sealing gasket (4) and a telescopic notch (5), the mounting groove (3) is an annular groove, the mounting groove (3) is opened on the surface of the casing head shell (1), the elastic sealing gasket (4) is installed inside the mounting groove (3), and the elastic sealing gasket (4) protrudes from the mounting groove (3); the telescopic notch (5) is an annular groove, the outer ring diameter of the telescopic notch (5) is smaller than the outer ring diameter of the mounting groove (3), and the telescopic notch ( 5) is provided on the bottom surface of the mounting groove (3); the clamping member comprises an embedding groove (6), a clamping block (7), a rubber gasket (8) and a through hole (13); the embedding groove (6) is provided on the outer ring surface of the elastic sealing gasket (4); one end of the clamping block (7) is plugged and fixed in the embedding groove (6); the other end of the clamping block (7) is movably plugged in the through hole (13); the through hole (13) is provided on the outer ring side wall of the mounting groove (3); the through hole (13) is connected to the mounting groove (3) and the bolt hole (2); the rubber gasket (8) is fixed to the other end of the clamping block (7); one end of the embedding groove (6) is provided with an inclined surface, and the inclined surface faces the notch of the mounting groove (3).

2. A casing head housing according to claim 1, characterized in that: The elastic gasket comprises an elastic gasket (9), a metal gasket (10), a long hole (11) and a metal elastic sheet (12). The elastic gasket (9) is fixed on the surface of the casing head shell (1). A plurality of metal gaskets (10) are installed on the surface of the elastic gasket (9). The long hole (11) passes through the metal gasket (10) and the elastic gasket (9), and the long hole (11) corresponds to the bolt hole (2) one by one.

3. A casing head housing according to claim 2, characterized in that: The metal elastic sheet (12) is connected between two adjacent metal gaskets (10).

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